DO — Auxiliary Verb (One-Page Notes)For printing / copying · British English pronunciation · Core rules common mistakes1️⃣ Core Rule (Most Important)Once you use do / does / did, the main verb must be in the base form!CorrectWrongDoes shelikecoffee?Does shelikescoffee?Did yougohome?Did youwenthome?They don’tfinishtheir task.They don’tfinishestheir task.2️⃣ How to Use do / does / didAuxiliaryUsed withTenseExampledo/duː/I, you, we, theyPresent simpleDoyou like English?does/dʌz/he, she, it, singular nounsPresent simpleDoesshe like coffee?did/dɪd/all subjectsPast simpleDidyou like the class?3️⃣ Five Main FunctionsFunctionStructureExampleQuestionsDo/Does/Did subject base verb?Doyou speak English?NegativesSubject don’t/doesn’t/didn’t base verbShedoesn’tlike coffee.Emphasisdo/does/did base verbIdolike English.Short answersYes, I do. / No, she doesn’t.Did they come?Yes, they did.SubstitutionAvoid repetitionI like coffee, and shedoestoo.4️⃣ DO as a Main VerbSentencePart of speechMeaningIdomy homework.Main verbdo homeworkShedoesthe dishes.Main verbwash the dishesHedidthe laundry.Main verbdo the laundryAs a main verb,docan take -s / -ed / -ing.As an auxiliary, the verb afterdomust be in the base form.5️⃣ Do Not Mix!WrongCorrectI do be happy.Iamhappy.Do you are tired?Areyou tired?She doesn’t can swim.Shecan’tswim.Do you can help me?Canyou help me?The verbbeand modal verbs form questions and negatives by themselves. They do not use do/does/did.6️⃣ Pronunciation Focus (British English)WordStrong formWeak formdo/duː//də/does/dʌz//dəz/did/dɪd//dɪd/don’t/dəʊnt/—doesn’t/ˈdʌznt/—didn’t/ˈdɪdnt/—Linking:Do you → /də juː/ or /duː juː/Did you → /dɪdʒuː/Does she → /dʌz ʃiː/7️⃣ Common MistakesWrongCorrectReasonDoes she likes coffee?Does shelikecoffee?Afterdoes, use the base verb.Did you went?Did yougo?Afterdid, use the base verb.I don’t am tired.Iam nottired.Bedoes not usedo.She doesn’t can swim.Shecan’tswim.Modal verbs do not usedo.Do he like English?Doeshe like English?Third person singular usesdoes.They don’t finishes.They don’tfinish.Afterdo, use the base verb.✅ One-Sentence SummaryDo / Does / Did are auxiliary verbs used to form questions, negatives, and emphasis; they are always followed by the base form of the verb. The verbbeand modal verbs do not use them.Printable · Copyable · Best kept on your deskHere is a completeTeacher’s Scriptfor a class onDO as an Auxiliary Verb. It is written in English and can be read aloud in class. It includes teacher talk, board work, examples, and interactive practice.Teacher’s Script: DO as an Auxiliary VerbTime:About 8–10 minutesLevel:Beginner to ElementaryTopic:Do / Does / Did as auxiliary verbs1. Greeting and Warm-up (1 minute)Teacher:Good morning, everyone. Today we are going to learn about a very small but very important verb:DO.We will look atdo,does, anddidasauxiliary verbs.Auxiliary verbs are also called “helping verbs.” They help the main verb.Let’s start with a quick question.Do you like English?(Pause for answers.)Good. You just heard the worddo. That is our topic today.2. What is an Auxiliary Verb? (1 minute)Teacher:An auxiliary verb is a helping verb. It works together with a main verb.For example:Do you like English?Here,dois the auxiliary verb, andlikeis the main verb.Now, look at these three sentences:Doyou like English?Doesshe like coffee?Didthey finish their task?What do you notice?(Pause.)Yes — we usedo,does, anddidto make questions.But they are not the same. Let’s see when to use each one.3. Do, Does, Did — When to Use (2 minutes)Teacher:(Write on the board.)DO— with I, you, we, they — present tenseDOES— with he, she, it, singular nouns — present tenseDID— with all subjects — past tenseLet’s read the examples together.Doyou like English?Doesshe like coffee?Didyou like the class?(Point to the board.)Remember:Doanddoesare for the present.Didis for the past.Anddidis the same for everyone — I, you, he, she, it, we, they.4. The Golden Rule (1 minute)Teacher:Now, here is the most important rule. Please listen carefully.Once you use do, does, or did, the main verb must be in the base form.Do not add -s, -ed, or -ing.Look at these correct and incorrect sentences.(Write on the board.)CorrectIncorrectDoes shelikecoffee?Does shelikescoffee?Did yougohome?Did youwenthome?They don’tfinishtheir task.They don’tfinishestheir task.(Point to the correct ones.)Afterdoes, we saylike, notlikes.Afterdid, we saygo, notwent.Afterdon’t, we sayfinish, notfinishes.Everyone, repeat after me:Does she like coffee?(Students repeat.)Did you go home?(Students repeat.)They don’t finish their task.(Students repeat.)5. Five Functions of DO (2 minutes)Teacher:Now let’s see what do, does, and did can do. They have five main jobs.(Write on the board.)1. QuestionsDo you speak English?Does she like coffee?Did they come yesterday?2. NegativesI do not understand.She does not like coffee.They did not finish their task.3. EmphasisIdolike English.Shedoesplay the piano every day.Theydidfinish the project.4. Short answersDo you like coffee? — Yes, I do. / No, I don’t.Does she like tea? — Yes, she does. / No, she doesn’t.Did they come? — Yes, they did. / No, they didn’t.5. SubstitutionI like coffee, and shedoestoo.He doesn’t like tea, but Ido.(Pause.)These are the five jobs. Do you have any questions so far?(Answer any questions briefly.)6. DO as a Main Verb (1 minute)Teacher:But wait —docan also be a main verb. That means it is not helping another verb. It is the main action.Look at these examples:Idomy homework.Shedoesthe dishes.Hedidthe laundry.Here,domeans “做” — to perform an action.Whendois a main verb, it can take -s, -ed, or -ing.But when it is an auxiliary verb, the next verb must be in the base form.So, compare:Idomy homework.(main verb)Idolike English.(auxiliary verb)In the first sentence,dois the action.In the second sentence,dohelpslike.The main verb islike.7. Common Mistakes (1 minute)Teacher:Now let’s look at some common mistakes. Please correct these sentences with me.(Write on the board, one by one.)Does she likes coffee?(Students: Does she like coffee?)Did you went?(Students: Did you go?)I don’t am tired.(Students: I am not tired.)She doesn’t can swim.(Students: She can’t swim.)Do he like English?(Students: Does he like English?)They don’t finishes.(Students: They don’t finish.)Teacher:Remember two important points:Beverbs andmodalverbs do not usedo/does/did.They make questions and negatives by themselves.For example:Areyou tired?Canyou help me?Sheishappy.Hecan’tswim.8. Summary and Homework (1 minute)Teacher:Let’s summarize.Do,does, anddidare auxiliary verbs.They help us make questions, negatives, emphasis, short answers, and substitutions.Afterdo / does / did, the main verb is always in thebase form.Beverbs andmodalverbs do not use them.Your homework:Write five sentences usingdo,does, ordid.Use at least one question, one negative, and one short answer.That’s all for today. Thank you, everyone.See you next class!End of Teacher’s Script DO — Auxiliary Verb 一页笔记版打印/抄写用 · 英音标注 · 核心规则 常见错误1️⃣ 核心规则最重要用了 do / does / did后面主要动词必须用「原形」正确错误Does shelikecoffee?Does shelikescoffee?Did yougohome?Did youwenthome?They don’tfinishtheir task.They don’tfinishestheir task.2️⃣ do / does / did 怎么用助动词用于时态例子do/duː/I, you, we, they一般现在时Doyou like English?does/dʌz/he, she, it, 单数名词一般现在时Doesshe like coffee?did/dɪd/所有人称一般过去时Didyou like the class?3️⃣ 五大功能功能结构例子疑问句Do/Does/Did 主语 动词原形Doyou speak English?否定句主语 don’t/doesn’t/didn’t 动词原形Shedoesn’tlike coffee.强调do/does/did 动词原形Idolike English.简略回答Yes, I do. / No, she doesn’t.Did they come?Yes, they did.替代动词避免重复I like coffee, and shedoestoo.4️⃣ do 也是实义动词句子do 词性意思Idomy homework.实义动词做作业Shedoesthe dishes.实义动词洗碗Hedidthe laundry.实义动词洗衣服实义动词 do 可加 -s / -ed / -ing。助动词 do 后面的动词必须用原形。5️⃣ 不能混用错误正确I do be happy.Iamhappy.Do you are tired?Areyou tired?She doesn’t can swim.Shecan’tswim.Do you can help me?Canyou help me?be 动词和情态动词自己构成疑问和否定不用 do/does/did。6️⃣ 发音重点英音单词强读弱读do/duː//də/does/dʌz//dəz/did/dɪd//dɪd/don’t/dəʊnt/—doesn’t/ˈdʌznt/—didn’t/ˈdɪdnt/—连读Do you → /də juː/ 或 /duː juː/Did you → /dɪdʒuː/Does she → /dʌz ʃiː/7️⃣ 常见错误总结错误正确原因Does she likes coffee?Does shelikecoffee?does 后动词原形Did you went?Did yougo?did 后动词原形I don’t am tired.Iam nottired.be 动词不用 doShe doesn’t can swim.Shecan’tswim.情态动词不用 doDo he like English?Doeshe like English?第三人称单数用 doesThey don’t finishes.They don’tfinish.do 后动词原形✅ 一句话总结Do / Does / Did 是助动词用来构成疑问、否定、强调后面永远跟动词原形。Be 动词和情态动词不用它们。可打印 · 可抄写 · 建议贴在书桌前